MK712

Touch Screen Controller

MDS 712 I

10

Revision 100899

Printed 11/16/00

Integrated Circuit Systems, Inc.•525 Race St.•San Jose•CA•95126•(408)295-9800tel•www.icst.com

I C R O

Electrical Specifications

Notes:

1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged

exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.

2. Consult MicroClock about the best device to use to generate the input clock.

3. With no missing codes.

4. Assumes no 14.3MHz input clock overshoot, 300

Ω screen, 100 PPS

5. Assumes no 14.3MHz input clock overshoot, no touch

6. With no touch, no clock

Parameter

Conditions

Minimum

Typical

Maximum

Units

ABSOLUTE MAXIMUM RATINGS (note 1)

ABSOLUTE MAXIMUM RATINGS (note 1)

Supply voltage, VDD

Referenced to GND

7

V

Inputs and Clock Outputs

Referenced to GND

-0.5

VDD+0.5

V

Ambient Operating Temperature

0

70

°C

Soldering Temperature

Max of 20 seconds

260

°C

Storage temperature

-65

150

°C

DC CHARACTERISTICS

Operating Voltage, VDD

3.0

5.5

V

Input High Voltage, VIH

VDD=5V

2.0

V

Input Low Voltage, VIL

VDD=5V

0.8

V

Output High Voltage, VOH

IOH=-2mA

VDD-0.4

V

Output High Voltage, VOH

VDD=5V, IOH=-12mA

2.4

V

Output Low Voltage, VOL

VDD=5V, IOL=12mA

0.4

V

Input High Voltage, VIH

VDD=3.3V

1.9

V

Input Low Voltage, VIL

VDD=3.3V

0.4

V

Output High Voltage, VOH

VDD=3.3V, IOH=-6mA

2.4

V

Output Low Voltage, VOL

VDD=3.3V, IOL=6mA

0.4

V

Operating Supply Current, IDD, at VDD=5V

300

Ω screen, 100 PPS

5

mA

Operating Supply Current, IDD, at VDD=3.3V

note 4

3

mA

Operating Supply Current, IDD standby, clock

note 5

0.5

3

µA

Operating Supply Current, IDD standby

note 6

0.5

3

µA

Operating Supply Current, IDD power down

PD=0 or PD=1, no clock

0.2

3

µA

Short Circuit Current

Each output

±50

mA

Input Capacitance

7

pF

AC CHARACTERISTICS

Input Clock Frequency, pin 18

Note 2

12

14.32

20

MHz

Input Clock Duty Cycle, pin 18

at 1.5V

25

75

%

Output Rise Time

0.8 to 2.0V, VDD=5V

3

ns

Output Fall Time

2.0 to 0.8V, VDD=5V

3

ns

Resolution

12

bits

Non-linearity

Monotonic, note 3

±2

LSB

Touch Screen Resistance

100

2000

Ω